Iran's president has accused Pakistani agents of involvement in a suicide bombing in south-east Iran targeting a group of elite Revolutionary Guards, BBC reported.
President Mahmoud Ahmadinejad called on Pakistan to apprehend the attackers, who Iranian officials suggested had arrived from Pakistan.
At least 35 people died in the attack, in south-eastern Sistan-Baluchistan.
A Pakistani spokesman condemned the attack, which has been blamed on the Sunni resistance group, Jundullah.
The foreign office spokesman, Abdul Basit, also dismissed Iranian claims that Jundullah's leader was in Pakistan.